11. Choose the best Lewis structure for CH2Cl2. A. В. c. H-0-0-0-H H-H--*-a: : H D E. *** མ་ ཡང་ H H CI-C-CI མ་ཡ་ C=C=C1

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11. Choose the best Lewis structure for CH2Cl2. A. В. c. H-0-0-0-H H-H--*-a: : H D E. *** མ་ ཡང་ H H CI-C-CI མ་ཡ་ C=C=C1: H 12. Which of the following statements is TRUE? A. A covalent bond is formed through the transfer of electrons from one atom to another. B. A pair of electrons involved in a covalent bond are sometimes referred to as "lone pairs." C. It is not possible for two atoms to share more than two electrons. D. Single bonds are shorter than double bonds. E. A covalent bond has a lower potential energy than the two separate atoms. 13. Draw the best Lewis structure for CH3-1. What is the formal charge on the C? A. O B. 1 C.-1 D.2 14. Electronegativity is a measure of A. the ability of a substance to conduct electricity. B. the charge on a polyatomic cation. C. the charge on a polyatomic anion. D. the ability of an atom in a molecule to attract electrons to itself. E. the oxidation number of an atom in a molecule or polyatomic anion. 15. In going from carbon-carbon single bond to a carbon-carbon double bond and then to a carbon-carbon triple bond, A. both bond length and bond energy increase. B. both bond length and bond energy decrease. C. bond length increases and bond energy is unchanged. D. bond length is unchanged and bond energy increases. E. bond length decreases and bond energy increases. 16. Atoms having equal electronegativities are expected to form A. No bonds B. Polar covalent bonds C. Nonpolar covalent bonds D. Ionic bonds E. Nonpolar ionic bonds F. Polar ionic bonds 17. Place the following in order of increasing bond length. NO NO; NO A. NO <NO< NO3 B. NO2 < NO; <NO C. NO; <NO< NO2 D. NO < NO, < NO2 E. NO; <NO< NO 2